refactor(app_configuration): remove unused features variable

- Remove unused variable 'features' in FeaturesConfigurationTab build method
- This change simplifies the code by removing an unnecessary variable assignment

Author: fulleni

lib/app_configuration/view/tabs/features_configuration_tab.dart

@@ -50,8 +50,7 @@ class _FeaturesConfigurationTabState extends State<FeaturesConfigurationTab> {
   @override
   Widget build(BuildContext context) {
     final l10n = AppLocalizationsX(context).l10n;
-    final features = widget.remoteConfig.features;
-
+    
     return ListView(
       padding: const EdgeInsets.all(AppSpacing.lg),
       children: [